Cheerful, small and comical, showing no trace of fear (5)
I believe the answer is:
sunny
'cheerful' is the definition.
(similar in meaning)
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for sunny that I've seen before include "cheerful sound" , "Cheerful - cloudless" , "Bright and warm" , "Cheerful; fine (weather)" , "(Of a person's disposition) always positive" .)